unable to fetch litecoin genesis block

[drunkirishcoder]

fetching litecoin genesis block seems to fail.

% curl -v http://localhost/api/v2/block/0
...
...
* Request completely sent off
< HTTP/2 500
< content-type: application/json; charset=utf-8
< date: Thu, 30 Jan 2025 19:41:46 GMT
< content-length: 34
< alt-svc: h3=":8443";ma=60;
<
{"error":"Internal server error"}

underlying cause seems to be Transaction '97ddfbbae6be97fd6cdf3e7ca13232a3afff2353e29badfab7f73011edd4ced9' not found

see it here as well, https://ltc1.trezor.io/block/0

[martinboehm]

Litecoin backend is not returning the genesis block...

[Asara]

Not sure this issue should be closed, nor do I think the issue is with litecoind itself.

Are we saying that none of the litecoind nodes that the trezor blockbook instances are connected to are returning the genesis block? ltc{1..5}.trezor.io all fail on this.

Looking at the the litecoind node itself and using the rpc endpoint, we are able to get the genesis block as well.

litecoin-cli getblock 12a765e31ffd4059bada1e25190f6e98c99d9714d334efa41a195a7e7e04bfe2
{
  "hash": "12a765e31ffd4059bada1e25190f6e98c99d9714d334efa41a195a7e7e04bfe2",
  "confirmations": 2840214,
  "strippedsize": 280,
  "size": 280,
  "weight": 1120,
  "height": 0,
  "version": 1,
  "versionHex": "00000001",
  "merkleroot": "97ddfbbae6be97fd6cdf3e7ca13232a3afff2353e29badfab7f73011edd4ced9",
  "tx": [
    "97ddfbbae6be97fd6cdf3e7ca13232a3afff2353e29badfab7f73011edd4ced9"
  ],
  "time": 1317972665,
  "mediantime": 1317972665,
  "nonce": 2084524493,
  "bits": "1e0ffff0",
  "difficulty": 0.000244140625,
  "chainwork": "0000000000000000000000000000000000000000000000000000000000100010",
  "nTx": 1,
  "nextblockhash": "80ca095ed10b02e53d769eb6eaf92cd04e9e0759e5be4a8477b42911ba49c78f"
}

On the blockbook side our logs show:

W0205 16:45:34.880203       1 worker.go:1237] DB inconsistency:  tx 97ddfbbae6be97fd6cdf3e7ca13232a3afff2353e29badfab7f73011edd4ced9: not found in txAddresses
E0205 16:45:34.880729       1 html_templates.go:148] explorerBlock error: getTransaction 97ddfbbae6be97fd6cdf3e7ca13232a3afff2353e29badfab7f73011edd4ced9: Transaction '97ddfbbae6be97fd6cdf3e7ca13232a3afff2353e29badfab7f73011edd4ced9' not found

[martinboehm]

Understood. But it is returning txid 97ddfbbae6be97fd6cdf3e7ca13232a3afff2353e29badfab7f73011edd4ced9 which cannot be fetched from the backend.

[Asara]

Okay then following up...
On bitcoin the block shows up: https://btc1.trezor.io/block/0
But the coinbase transaction also fails: https://btc1.trezor.io/tx/4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b

[arnaud-dfns]

If we query the block with level 2 verbosity, get should have enough data to index the block

litecoin-cli  getblock 12a765e31ffd4059bada1e25190f6e98c99d9714d334efa41a195a7e7e04bfe2 2
{
  "hash": "12a765e31ffd4059bada1e25190f6e98c99d9714d334efa41a195a7e7e04bfe2",
  "confirmations": 2840227,
  "strippedsize": 280,
  "size": 280,
  "weight": 1120,
  "height": 0,
  "version": 1,
  "versionHex": "00000001",
  "merkleroot": "97ddfbbae6be97fd6cdf3e7ca13232a3afff2353e29badfab7f73011edd4ced9",
  "tx": [
    {
      "txid": "97ddfbbae6be97fd6cdf3e7ca13232a3afff2353e29badfab7f73011edd4ced9",
      "hash": "97ddfbbae6be97fd6cdf3e7ca13232a3afff2353e29badfab7f73011edd4ced9",
      "version": 1,
      "size": 199,
      "vsize": 199,
      "weight": 796,
      "locktime": 0,
      "vin": [
        {
          "ismweb": false,
          "coinbase": "04ffff001d0104404e592054696d65732030352f4f63742f32303131205374657665204a6f62732c204170706c65e280997320566973696f6e6172792c2044696573206174203536",
          "sequence": 4294967295
        }
      ],
      "vout": [
        {
          "ismweb": false,
          "value": 50.00000000,
          "n": 0,
          "scriptPubKey": {
            "asm": "040184710fa689ad5023690c80f3a49c8f13f8d45b8c857fbcbc8bc4a8e4d3eb4b10f4d4604fa08dce601aaf0f470216fe1b51850b4acf21b179c45070ac7b03a9 OP_CHECKSIG",
            "hex": "41040184710fa689ad5023690c80f3a49c8f13f8d45b8c857fbcbc8bc4a8e4d3eb4b10f4d4604fa08dce601aaf0f470216fe1b51850b4acf21b179c45070ac7b03a9ac",
            "type": "pubkey"
          }
        }
      ],
      "hex": "01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff4804ffff001d0104404e592054696d65732030352f4f63742f32303131205374657665204a6f62732c204170706c65e280997320566973696f6e6172792c2044696573206174203536ffffffff0100f2052a010000004341040184710fa689ad5023690c80f3a49c8f13f8d45b8c857fbcbc8bc4a8e4d3eb4b10f4d4604fa08dce601aaf0f470216fe1b51850b4acf21b179c45070ac7b03a9ac00000000"
    }
  ],
  "time": 1317972665,
  "mediantime": 1317972665,
  "nonce": 2084524493,
  "bits": "1e0ffff0",
  "difficulty": 0.000244140625,
  "chainwork": "0000000000000000000000000000000000000000000000000000000000100010",
  "nTx": 1,
  "nextblockhash": "80ca095ed10b02e53d769eb6eaf92cd04e9e0759e5be4a8477b42911ba49c78f"
}

To me the difference between bitcoin (working) and litecoin is around here
https://github.com/trezor/blockbook/blob/master/bchain/coins/btc/bitcoinrpc.go#L563-L565
https://github.com/trezor/blockbook/blob/master/bchain/coins/litecoin/litecoinrpc.go#L75-L79